1, complain to the Consumer Council.
2. Bring a lawsuit to the court.
In addition, the practice of the industrial and commercial departments is also open to question. You actually reported illegal clues to the industrial and commercial department, which should file an investigation, and whether parallel imports were investigated by the industrial and commercial department (it should not be difficult), so there is suspicion of administrative inaction.
It's like going to the public security department to report someone suspected of theft. Whether theft should be investigated by the public security department, and it is impossible for all informants to provide evidence.